Published: December 1959-January 1960
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Story Featuring Challengers of the Unknown
Script credit from Bob Hughes.
"Although a year on Mars is equal to 687 Earth-days..."
Ad Featuring Daisy Air Rifles / Daisy B-B Guns
Back cover.
Ad Featuring Jowett Institute of Physical Training
Inside back cover.
Ad Featuring Stephens Credit Sales Mottoes
Story Featuring Blackhawk
Ad Featuring Wilson Chemical Company Cloverine Brand Salve
Sold by Wilson Chemical Co.
Ad Featuring Hi-Power Binoculars
"Your favorite heroes..."
Ad Featuring Zenith Stamps
Ad Featuring Art Instruction, Inc. courses
Inside front cover.
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